feat: analytics parity — tool cost, date ranges, budgets, query explorer, replay, snapshots (v2.4.0)

Analytics parity phases 2–7 (docs/plans/analytics-parity/), built on
138e706 and ported onto v2.3.1:
- Cost by AI tool (?tool= on cost/analytics/stats/workflows, by_tool,
  Codex fast/priority and flex tiers, agenthub_cost_usd_total{tool,model})
- Date ranges (from/to) on cost/analytics/workflows; Analytics range select
  with Today / This week (Monday) / This month (1st) / 7d / 30d / 90d / All /
  Custom; workflow filters carried into workflow-stats.js (read worker)
- Budgets and cost alerts as alert rule types (alert_rules rebuilt without
  its rule_type CHECK), GET /api/budgets/status, rule preview, spend pace,
  status-bar budget chip; rules stay editable in place
- Query Explorer (/query, allowlisted sort, CSV/JSON export) and scheduled
  reports (report_definitions/report_runs, Settings → Reports)
- Session Replay tab and immutable snapshots (session_snapshots, /snapshot/:token)
- Remote Codex sync, push ingest with a hashed token, privacy redaction and
  ignored folders (Settings → Data), Cursor sessions (no cost)
- Read-only MCP server, statusline, Grafana/Prometheus files

Also: resizable sidebar, pet run/wave animations, the workspace home keeps a
half-typed prompt, and the pre-commit hook runs only the related tests for a
small commit.

README.md

@@ -86,6 +86,12 @@ Internal build — all rights reserved.
   notification type can pick its own.
 - **A CLI for all of it** (`agenthub`, plus `agenthub repl`), a PWA install, and
   a UI in English, Vietnamese, Chinese and Korean.
+- **Outside the dashboard, all opt-in:** a read-only MCP server
+  (`claude mcp add agenthub -- agenthub mcp`, [docs/MCP.md](docs/MCP.md)), a
+  Claude Code statusline with session and today's cost
+  (`agenthub statusline install`, [docs/STATUSLINE.md](docs/STATUSLINE.md)), and
+  Prometheus rules + Grafana boards for `/api/metrics`
+  (`docker-compose.monitoring.yml`, [docs/MONITORING.md](docs/MONITORING.md)).
 
 ## Prerequisites
 
@@ -268,6 +274,13 @@ for a session the hooks report on (a long tool call writes nothing, and after a
 Stop agy may still be waiting for you), after two minutes for one without
 hooks. Antigravity workspaces carry no pipeline either.
 
+**Cursor** sessions — the Cursor CLI's and the Cursor editor's agent chats — are
+read from Cursor's agent transcripts
+(`~/.cursor/projects/*/agent-transcripts/`, every `DASHBOARD_CURSOR_POLL_MS` ms,
+default 15000) and appear in Sessions with a **Cursor CLI** badge. Cursor writes
+no token counts or model ids there, so a Cursor session shows no tokens and no
+cost.
+
 **Pipelines are dormant.** AgentHub ships no pipeline template, so a workspace has no
 stages until you drop a template JSON into `DASHBOARD_PIPELINES_DIR` (see
 [`docs/LANES.md`](docs/LANES.md#custom-pipeline-templates)); until then
@@ -314,7 +327,13 @@ npm run test:server    # node:test
 npm run test:client    # Vitest
 ```
 
-Both must be green before a commit; the pre-commit hook runs them plus Prettier.
+Both must be green before a commit. The pre-commit hook (`.husky/pre-commit`)
+runs Prettier, then the tests the commit needs: both full suites for a big or
+risky commit (over 10 code files, a dependency, build/test config or the hook
+itself, a deleted file), only the related tests for a small one (`vitest
+related` for `client/`, the server test files that name each other staged
+module), nothing for docs alone. `AGENTHUB_FULL_TESTS=1 git commit …` forces
+both full suites.
 
 ## Layout
 
@@ -323,6 +342,8 @@ Both must be green before a commit; the pre-commit hook runs them plus Prettier.
 | `server/` | Express API, SQLite schema, hook ingest, workspace and worktree libraries |
 | `client/` | React 18 + Vite + Tailwind dashboard |
 | `bin/agenthub.js` | CLI |
+| `mcp/`, `statusline/` | Read-only MCP server and Claude Code statusline (opt-in) |
+| `monitoring/` | Prometheus config/rules and Grafana boards for `/api/metrics` |
 | `docs/` | Architecture, API, workspaces, database |
 | `plugins/` | Claude Code plugins shipped with the dashboard |